22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Diameter and lay it flat in

and lay it flat in the grid

this thermostat guard is the perfect solution for safeguarding your temperature controls

actual front end outer dimensions are approximately 19

Actual Filter Size – 23 3/4"w x 13 3/4" x 1"

Simplified Installation: Our Radial Damper ensures easy setup

22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Diameter and lay it flat in+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 18" OR 18" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 17. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum